Adsorbent for phosphoric acid

a phosphoric acid and phosphoric acid technology, applied in the field of phosphoric acid adsorption, can solve the problems of high time cost and environmental load on activated carbon, difficult removal of phosphoric acid from high concentration organic solutions, and large caloric value of activated carbon, etc., and achieve high performance for adsorption of phosphoric acid. , the effect of easy production

Inactive Publication Date: 2005-05-19
MUROMACHI CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] It is an object of the present invention to provide an adsorbent for phosphoric acid that solves the above-mentioned problems of the pr...

Problems solved by technology

However, in recent years, discharge of excessive amounts of phosphoric acid in the environment, balance disorders in uptake of phosphoric acid and the like have been pointed out.
However, the existing methods and materials have the following drawbacks.
(1) They have drawbacks in properties that removal of phosphoric acid from high concentration organic solutions is difficult.
(2) Additional carrying of a heavy metal compound on a conventional porous material or cellulose upon fabrication incurs a great time cost and load on the environment.
Activated carbon requires a large amount of caloric values upon production and generates heat and carbon dioxide.
Those which use aluminum have the possibility of causing Alzheimer's disease.
In addition, those based on materials obtained by use of organic synthesis, as observed in the case of, for example, ion exchange resins which include a polystyrene reaction product as a base material, have the danger of generating environmental hormones...

Method used

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  • Adsorbent for phosphoric acid

Examples

Experimental program
Comparison scheme
Effect test

production example 1

(Production of Ferric Alignate Gel)

[0035] 200 ml of aqueous 0.25% sodium alginate solution was dripped by using a roller pump at a rate of about 1 ml / second into 500 ml of aqueous solution of 1% ferric chloride (FeCl3) in a beaker with stirring. The diameter of droplets upon dripping was about 1 mm to about 2 mm. This operation formed a reaction product gel in the form of a substantially regular sphere of about 1.5 mm to about 3 mm in diameter. The gel was transferred to a 300 μm sieve and washed with pure water until the color of the aqueous iron solution is completely lost to produce 52.2 g of gel.

production example 2

(Production of Ferric Pectin Gel)

[0036] 200 ml of aqueous 0.25% pectin solution was dripped by using a roller pump at a rate of about 1 ml / second into 500 ml of aqueous solution of 1% ferric chloride (FeCl3) in a beaker with stirring. The diameter of droplets upon dripping was about 1 mm to about 2 mm. By this operation was formed a reaction product gel having an appearance similar to erythiocyte of about 1.5 mm to about 3 mm in diameter. The gel was transferred to a 300 μm sieve and washed with pure water until the color of the aqueous iron solution is completely lost to produce 51.3 g of gel.

production example 3

(Production of Dried Product of Agar-Immersed Ferric Alginate Gel)

[0051] 52.2 g of the ferric alginate gel prepared in Production Example 1 was charged in 1,000 ml of 0.1% agar solution to immerse for 1 hour while stirring and the resultant was transferred to an about 300 μm sieve and washed with 20 liters of pure water at about 60° C., followed by drying the resultant in an incubator at 60° C. for 5 hours to prepare 0.53 g of a dried product of agar-immersed ferric alginate gel.

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Abstract

Provided is an adsorbent for phosphoric acid which can be produced with ease, exhibits high adsorbability of phosphoric acid and is free from any problems in use thereof. The adsorbent for phosphoric acid which includes a water-insoluble reaction product formed by mixing an iron ion and a natural polysaccharide having a carboxylic functional group or a sulfuric acid functional group such as alginate, pectin and carrageenan in a solution, or a dried product thereof. The additional incorporation of a hydrophilic polymer such as agar into the adsorbent prevents the reduction in adsorbability of phosphoric acid in the case where a trivalent iron ion is used to produce the dried product of a water-insoluble reaction product.

Description

TECHNICAL FIELD TO WHICH THE INVENTION BELONGS [0001] The present invention relates to an adsorbent for phosphoric acid which includes a water-insoluble reaction product formed by mixing a divalent or trivalent iron ion and a natural polysaccharide having a carboxylic acid functional group or a sulfuric acid functional group and the invention relates, for example, to fields of water treatment including supply water and sewage as well as drinking water, fields of pretreatments of foods, chemicals, and analytical samples, or fields of pharmaceuticals. PRIOR ART [0002] Phosphoric acid is an essential biomolecule which is known to widely occur in natural and artificial environments and plays an important role in biological activities of living organisms. However, in recent years, discharge of excessive amounts of phosphoric acid in the environment, balance disorders in uptake of phosphoric acid and the like have been pointed out. To solve the problems, various adsorbents and coagulants ...

Claims

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Application Information

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IPC IPC(8): A61K9/16A61K31/731A61K31/732A61K31/734A61P3/00B01J20/26
CPCA61K9/1652A61K31/731A61K31/732B01J20/265B01J20/26B01J20/262A61K31/734A61P3/00B01J20/24
Inventor SANO, HIROYUKIIENAKA, TORUNODA, HITOSHITOMOTO, AKIHIKO
Owner MUROMACHI CHEM
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